Design and Analysis of a Single Switch DC-DC Boost Converter Based on Voltage Lift Technique

Abstract

Renewable energy systems (solar, fuel cells, batteries) are one of the trending research topics due to its ease of availability, sustainability, and environmental friendliness. DC-DC converters impart a crucial role in these renewable energy systems while boosting up the voltages to higher levels. In this thesis, a novel structure of DC-DC boost converter based on voltage lift technique is presented. The extensive analysis is performed for the proposed converter in continuous current mode (CCM) and discontinuous current mode (DCM) along with the voltage and current relations of converter elements and semiconductor devices. Moreover, critical values of inductors are determined to investigate the boundary conditions between CCM and DCM. It was firmly concluded that while considering the lesser number of elements and semiconductor devices for the same input voltage the proposed converter can yield comparatively high voltage gain than the conventional boost dc-dc converters. Root mean square (RMS) values of the voltages and currents for the elements and semiconductors are also calculated along with the converter’s efficiency at various duty cycles. Simulation results of the proposed converter are provided in CCM and DCM using PSIM software. Finally, to avail the desired validation of acquired simulation results a laboratory prototype of the proposed converter is tested and comparisons were made with the theoretical analysis.